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    <title>Document</title>
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    <script>
        //生成器起始就是一个特殊的函数
        //异步编程  纯回调函数 node fs ajax mongdb
        //函数代码的分隔符
        function* gen(){
            // console.log('hello generator');
            console.log(111);
            yield '一只没有耳朵';
            console.log(222);

            yield '一直没有尾巴';
            console.log(333);

            yield '真奇怪'
            console.log(444);

        }

        // let iterator = gen()
        // console.log(iterator);
        // iterator.next()//111
        // iterator.next()//222
        // iterator.next()//333
        // iterator.next()//444

        //遍历
        for(let v of gen()){
            console.log(v);
        }

    </script>
</body>
</html>